I am just having a smile imagining HM QE being "dissolute, dissipated, degenerate, corrupt, depraved" as decadent is defined in the dictionary.
Maybe there is a Dorian Grey portrait of her somewhere in the attic of Buck House, looking blowsy and lascivious with her boobs spilling out of a red satin basque, black fishnet tights and six-inch diamante heeled shoes, stubbing out chain-smoked black Sobranie ciggies into her caviar and glugging back Mother's Ruin while several bronzed Adonises massage her ego. Meanwhile Russian oligarchs and Greek shipping moguls are stuffing paper money into her stocking tops in return for contracts entitling them to fleece Uk citizens without fear of legal action.